Military term, 'Fucking New Guy' usually someone just out of training or just transfered into the unit/AO, who either hasn't proved his worth or doesn't know how to operate properly due to lack of experiance.

"Damnit, nearly everyone here is an FNG, we'll be wiped out on the next op"

Fucking New Guy.
A term used in 'Nam to denote someone new in country. Troops who had some time under their belt wouldn't talk to them until they proved that they wouldn't die within the first few days.

The Urban Dictionary T-Shirt

Fuckin' New Guy. Term still used in the western English-speaking armed forces of the west (primarily United States, Australia, United Kingdom and Canada) to denote a new soldier fresh off his basic training. It means they have the basics but no real experience, so they do everything by the book (which is not always best) and they are overly keen and always shut down on long excersices.

Some people stay F.N.G.'s for years, however most switched-on soldiers lose the status within a year.

The Urban Dictionary T-Shirt

Abbreviation for Flip-n-Grip. An Asian massage parlor where you get jerked off at the end of the massage. Or after they are done rubbin' you down, they flip-n-grip. That is if they massage you at all...

Man, there was this fine ass little ho at the F 'n' G last night that blew my mind!